Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
The word betulinus could not be parsed. Trying a normal dictionary lookup:
No entries found. Showing closest matches:
betŭla (also betulla), ae, f., the birch, Plin. 16, 18, 30, § 75; 16, 37, 69, § 176.
† baetŭlus (bēt-), i, m., = βαίτυλος, a precious stone, round and of a dark color, a species of ceraunia, Plin. 37, 9, 51, § 135.
betŭlus, v. baetulus.